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19. HDRI and Image-Based Lighting
Monday, Half Day
Part I: 10:30 am - 12:15 pm
Part II: 6 - 8 pm
Room 29 A-D
Level: Intermediate
Lighting CG scenes with captured real-world light can increase realism and help integrate computer-generated and real-world imagery. This course teaches the theory behind HDRI and IBL and presents practical production-ready techniques for applying them. It includes high-dynamic-range imagery, light probes, global illumination, approximation methods, and IBL-based live-action compositing.
Prerequisites
Some experience with a traditional modeling/rendering package, such as 3DS Max, LightWave, Maya, or XSI, and some familiarity with basic lighting and compositing. Not required: advanced ray tracing or global illumination knowledge.
Topics
High-dynamic-range photography, lighting acquisition, image-based lighting and compositing, real-time techniques, and ongoing research in illuminating real people and objects with sampled light. Use of these techniques in actual productions with particular software pipelines and the required basics of light reflection and global illumination.
Syllabus and Additional Resources
Organizer
Paul Debevec
University of Southern California, Institute for Creative Technologies
Lecturers
Rod Bogart
Industrial Light + Magic
Paul Debevec
University of Southern California, Institute for Creative Technologies
Frank Vitz
Independent VFX Supervisor
Greg Ward
Anyhere Software
Schedule
| Part 1: Fundamentals of HDR and IBL |
| 10:30 |
Introduction
Debevec |
| 10:40 |
Global Illumination and HDRI File Formats
- Global Illumination Techniques: Radiosity, Ray-Tracing, Monte Carlo
- High Dynamic Range Image
File Formats: Radiance, PFM,
LogLuv TIFF, OpenEXR
Ward |
| 11:25 |
Image-Based Lighting
- Capturing Real-World
Illumination
- Illuminating Synthetic Objects
With Real Light
- Rendering Synthetic Objects Into
Real Scenes
- Making "Rendering With Natural Light" and "Fiat Lux"
Debevec |
| Part 2: HDR and IBL in Production |
| 6:00 |
Introduction
Debevec |
| 6:05 |
HDR and IBL at Industrial Light + Magic
- The OpenEXR File Format
- Lighting and Modeling With Omnidirectional HDR Imagery
- What Does 1 Mean?
- Compositing, Shading, and Painting With Numbers Greater Than 1
Bogart |
| 6:35 |
Specialized HDRI/IBL Techniques
- Capturing Light Probes That Include the Sun
- Alternate IBL Approaches
- Illuminating Real Objects and People: Light Stage 2
- Lighting Reproduction for Compositing: Light Stage 3
Debevec |
| 7:15 |
HDRI and IBL for X-Men 2
- Managing Gamma and Color
Spaces
- Mystique effects in X-Men 2
- Using HDRI on X-Men 2
- Lighting Capture Design Decisions
Vitz |
| 7:45 |
Audience Questions and Answers
Debevec, Ward, Vitz, and Bogart |
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